The organelles responsible for organizing microtubules that are a part of the mitotic spindle are called
A. microvilli.
B. nucleoli.
C. centrioles.
D. vesicles.
E. cilia.
Answer: C
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NAD, a key coenzyme used in the process of producing ATP, is produced from which water-soluble vitamin?
a. riboflavin b. vitamin B12 c. niacin d. vitamin B12
The period in the early development of a disease when the signs are vague is known as
A) latent B) prodromal C) subclinical D) syndrome
Aldosterone exerts its effect on the kidney tubules by
A. increasing tubular renin production. B. increasing tubular permeability. C. increasing the synthesis of the transport proteins for Na+. D. increasing osmosis into the tubule cells. E. decreasing tubular permeability.
Which of the following is (are) true of the growth of the skeleton?
A) All bone formation ceases immediately after the end of adolescence. B) Calcification of bones does not occur until an infant begins to learn to walk. C) It begins to ossify at six weeks of gestational age. D) All of the answers are correct. E) None of the answers are correct.